<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
    <title>Document</title>
    <style>
        .one{
           width: 100px; 
           height: 100px;
           background-color: aqua;
        }
        .two{
           width: 200px; 
           height: 200px;
           background-color: aqua;
        }
        .three{
           width: 300px; 
           height: 300px;
           background-color: aqua;
        }
    </style>
</head>
<body>
    <div id="app">
        <div :class="['one','two','three']"></div>
        <!-- 
            强制绑定class的值也可以是一个数组中的每一个值作为当前元素的类名
            强制绑定的class和普通的class是可以一起存在的
         -->
        <div class="public" :class="boxClass"></div>
    </div>
    <script>
        const vm = new Vue({
            el:"#app",
            data() {
                return{
                    boxClass:['one','two','three']
                }
            }
        })
    </script>
</body>
</html>